:root {
    --primary-color: #2c3e50;
    --secondary-color: #27ae60;
    --warning-color: #e74c3c;
    --background-color: #f5f6fa;
    --text-color: #2c3e50;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
}

.main-nav {
    background-color: var(--primary-color);
    padding: 1rem 2rem;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.dashboard-container {
    padding: 2rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.grid-item {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: opacity 0.3s;
}

.btn.primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn.secondary {
    background-color: #ecf0f1;
    color: var(--text-color);
}

.btn:hover {
    opacity: 0.9;
} 